The movie is about the promiscuous wives who seduce their husband's friend when he comes to stay overnight. He goes to a friend's house to hang out, but he gets so caught up in conversation that he misses the last train home, so he has to stay there for the night. The house is cramped, so he has to share a bed with his friend's couple. Unexpectedly, in the middle of the night, his friend's promiscuous wife secretly tries to seduce him...